摘要
随着养护龄期的增长,再生混凝土的强度基本呈线性关系递增;再生粘土砖混凝土替代率为40%~80%时,强度折减一级;当粗骨料全部被粘土砖取代时,再生粘土砖混凝土强度等级仅为C30;再生废弃混凝土骨料的混凝土替代率为20%时强度最高,废弃混凝土占粗骨料的80%时,强度最低;再生粘土砖、废弃混凝土骨料的混凝土替代率和强度基本符合线性递减关系。最优骨料类型为20%替代率的再生废弃混凝土。
With the age growing, strength of recycled concrete increases linearly.The strength degrades one level if the substitution rate is between 40% and 80%, and decline to C30 level with 100% substitution rate. The strength of concrete with abandoned concrete is at its best in 100% substitution rate while is at its worst in 80% substitution rate. Basically, strength of concrete with recycled clay brick and abandoned concrete decreases to substitution rate linearly. The best coarse type is recycled abandoned concrete with 20% substitution rate.
出处
《建筑技术》
北大核心
2016年第1期39-43,共5页
Architecture Technology
基金
国家自然科学基金资助(51208175)
中国博士后基金资助项目(2012M511186)
关键词
再生混凝土
龄期
粗骨料类型
替代率
抗压强度
recycled concrete
age
coarse aggregate type
substitution rate
compressive strength